David Ian Brown wrote:
>
> Hi Jeff,
> You are correct that PyNIO does not currently give any indication of
> the precision of the data in
> any attribute similar to the CDC least_significant_digit attribute. I
> can look into this as a possible enhancement.
> However, a problem that I can foresee based on a quick perusal of some
> files with wgrib is that because the
> packing for each GRIB record is handled individually, based, I
> believe, on the range of the data within the
> record, the least significant digit may not be constant for all
> horizontal slices of a PyNIO GRIB variable. I would have to
> investigate further to know whether this is really the case. If it
> is, I suppose one could provide a maximum and
> minimum least significant digit for the variable as a whole.
> -dave
>
Dave: Thanks - you are right, the packing can change with level. I
think it would be very useful to have the maximum
least_significant_digit as an attribute in that case, at least you could
then safely ignore all the numbers to the right of that decimal place.
-Jeff
-- Jeffrey S. Whitaker Phone : (303)497-6313 Meteorologist FAX : (303)497-6449 NOAA/OAR/PSD R/PSD1 Email : Jeffrey.S.Whitaker_at_noaa.gov 325 Broadway Office : Skaggs Research Cntr 1D-124 Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg _______________________________________________ pyngl-talk mailing list pyngl-talk_at_ucar.edu http://mailman.ucar.edu/mailman/listinfo/pyngl-talkReceived on Wed Sep 20 2006 - 15:38:33 MDT
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